JPS6039456A - Knitting yarn exchange apparatus for circular knitting machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] This invention operates a plurality of yarn paths individually according to a predetermined program to supply new silk yarn to knitting needles at any time, and also cuts yarns being knitted and feeds them to knitting needles. This invention relates to a knitting yarn exchange device for a circular knitting machine that stops the supply of yarn.

Conventional silk thread changing devices of this type had a plurality of thread paths corresponding to each knitting yarn feeder, and the selection of a selector for controlling switching of the desired thread path was controlled by the operation of an electromagnet. However, the operation at the time of starting is unstable, and therefore measures such as using a strong magnet or temporarily applying a high voltage, that is, a so-called surge voltage, have been taken.

The present invention has been made with the aim of obtaining a device that does not have these drawbacks of conventional devices, and will be explained below with reference to the drawings.

As mentioned above, the knitting yarn exchange device is equipped with a plurality of knitting yarn feeders and a plurality of corresponding yarn paths, and operates a control mechanism according to a program to individually control each yarn path and perform knitting yarn exchange. However, in the figure, only one yarn feeder, one yarn path, and one operating mechanism are shown. Referring to the figure, 1 is a solenoid, the tip of the plunger 2 is connected to a selector 3 by a pin 4, the selector 3 is pivotally supported by a shaft 5, and one end has a claw portion 3'. The other end is always kept in tension by the biasing force of the spring 6.

The camshaft 7 has a rack lever 8 which is reciprocated about the camshaft 7 by an angle of 90 degrees by an actuating device such as a cam device (not shown) for each revolution of the cylinder (not shown) of the knitting machine. A thread guide operating cam 10 and an operating cam 11, which rotate simultaneously with the cam wheel 9 and have similar shapes and are slightly out of phase with each other, are fitted.

The periphery of the cam foil 9 has four cutouts s9a and 9b.

9c and 9d are provided at equal intervals, and the cutout portion is pivotally supported by the fixed shaft 12 on the rack lever 8, and the tip 14 of the rack pawl 14 is always in a state of tension due to the biasing force of the spring 13. ' and the rear end 14'' of the rack pawl.
is configured to engage with the claw portion 3I of the selector 3.

A thread guide 16 having a thread guide 15 at its tip is connected via a shaft 19 to a thread guide operating lever 18 that swings around a shaft 17 at the other end. A convex portion 18' is provided which presses against the circumferential surface of the thread guide operating cam 1o by force and slides on the circumferential surface of the cam, and a fixing pin 21 is fitted into the thread guide 16 to prevent the thread guide 16 from moving forward or backward. A guide groove 22 is provided to regulate the movement.

23 is a fixed blade 24 and a movable blade 26 that rotates around a shaft 25.
A cutting thread end gripping device C (not shown) is provided adjacent to the end. That demon p
, the end of the movable blade 26 is connected to one end of the operating lever 27 via the shaft 28, and the other end of the operating lever 27 is branched into two, Two convex portions 27' and 2a are provided at a distance of 1/4 of the total circumferential length of the branch actuating cam 11 to press against the east actuating cam and slide on the circumferential surface of the cam. 29 is a knitting yarn, 30 is a yarn feed log guide, 31 is a knitting needle on the cylinder of the knitting machine, and 32 is a latch guard.Next, we will give an example of one yarn path for the operation of the device of the present invention. A case will be described in which yarn is fed, the cylinder of the knitting machine rotates once, the first course of knitting is completed, and the second course of knitting is subsequently performed without replacing the knitting yarn.

Normally, as shown in FIG. 1, the rack lever 8 is fixed in the raised position by a pin (not shown), and the tip 14' of the rack pawl 14 on the rack lever 8 is attached to the spring 13.
Due to the biasing force, the cam foil 9 is brought into engagement with the notch 9a of the cam foil 9, and the yarn is fed to the knitting machine. Now assume that the cylinder of the knitting machine has rotated once and knitting of the first hoose has been completed. A signal emitted from a program control device (not shown) is transmitted to an actuating device (not shown) for the rack lever 8, and the pin is removed and the rack lever 8 is rotated at a 90 degree angle in the downward direction about the shaft 7. Start rotating and rack lever 8
The rear end 14' of the rack pawl 14, which rotates together with the selector 3,
The selector 3 is pressed down slightly as shown in FIG. 2, and the selector 3 slides over the claw 3'.
As shown in FIG. 3, it engages with the claw portion 3' of the selector 3, and the tip 14/ of the rack claw 14 engages with the cutout 9b of the cam foil 9 and stops.

On the other hand, since the yarn feeding stop signal is not transmitted to solenoid 1,
The solenoid 1 does not operate, and the rack lever 8 immediately starts to reverse and rise. 4, the rack pawl 14 rotates around the shaft 12 as shown in FIG.
The tip 14' of the rack lever 8 is removed from the notch 9b of the cam wheel 9, and the rack lever 8 is rotated 90 degrees to return to the state shown in FIG.

Therefore, the cam wheel 9 is completely unaffected by the rotation of the rack lever 8, and since the yarn path operating cam 10 and the fall operating cam 11 do not rotate, yarn feeding continues, and knitting of the second foot is carried out. It will be destroyed.

Next, a case will be described in which yarn feeding to the knitting machine is performed, the cylinder of the knitting machine rotates once, the first course of knitting is completed, and feeding of the knitting yarn is stopped.

In the state shown in Figure 1, the yarn is fed to the knitting machine, the cylinder of the knitting machine rotates once, the first knitting is completed, and the signal issued from the program control device (not shown) is as follows: The signal is transmitted to the actuating device (not shown) of the rack lever 8, and the rack lever 8 rotates by 90 degrees in the downward direction about the shaft 7, and the rack pawl 14 rotates together with the rack lever 8.
The rear end 14'' comes into contact with the claw part 3' of the selector 3, and as shown in FIG. As shown in the figure, the claw portion 3' of the selector 3
The tip 14' of the rack pawl 14 engages with the notch 9b of the cam foil 9 and stops. On the other hand, the yarn feeding stop signal from the program control device is transmitted to the solenoid 1, and the plunger 2 of the solenoid 1 is pulled as shown in FIG. 5, so that the selector 3 connected to the pin 4 also It resists the biasing force of the spring 6 and swings around the shaft 5, and the rear end 14' of the rack claw 14 and the claw portion 3' of the selector 3 are disengaged from each other.

Therefore, the tip 14' of the rack claw 14 is connected to the cam wheel 9.
As the cam wheel 9. engages with the notch 9b of the rack lever 8, it starts to move up and reverse together with the rack lever 8 and rotates through an angle of 90 degrees, so that the cam wheel 9. Yarn guide operating cam 10, fu-operating force cam 1
1 also rotates by an angle of 90 degrees. Therefore, the convex portion 18' of the thread guide operating lever 18 slides while contacting the peripheral surface of the thread guide operating cam 10 due to the biasing force of the spring 20, and the fixing pin 21 slides in the guide groove 22 of the thread guide 16. While moving the thread guide 16 backward, the convex portion 2 of the cane operating lever 27
7/, 2γ slides while contacting the surface of the desk operating cam 11, closes the movable blade 26 of 23, cuts the knitting yarn between it and the fixed blade 24, and terminates the relationship with the knitting needle 30 on the cylinder. At the same time, the solenoid 1 returns to a state where yarn feeding is stopped.

Then, when the cylinder of the knitting machine rotates once after the yarn feeding to the knitting machine has been stopped and the yarn feeding to the knitting machine continues to be stopped for the next course, the signal issued from the program control device is 8, the rack lever 8 begins to rotate by 90 degrees in the downward direction about the shaft 7, and as shown in FIG.
The cutout 9C of the cam wheel 9 and the rear end 14' engage with the claw portion 3' of the selector 3 and stop, but the yarn feeding start signal is not transmitted to the solenoid 1, so the solenoid is not activated. First, the rack lever 8 starts to rise and reverse, and the rear end 14'' of the rack pawl 14, which rotates together with the rack lever 8, is pressed against the spring 13 by the selector 3 pawl portion 3' that engages with the rear end 14''.
The rack claw 14 rotates around the shaft 12, and the tip 14' of the rack claw 14 comes off the cutout 9C of the cam foil 9, and the rack lever 8 and the rack claw 14 rotate at 90 degrees. It rotates and then returns to the state shown in FIG. 6 again.

Therefore, the cam wheel 9 is completely unaffected by the rotation of the rack lever 8, and the thread guide operating cam 10° 11 operating cam 1
1 does not rotate, so the yarn feeding halt state continues.

On the other hand, when yarn feeding to the knitting machine is stopped in the state shown in Fig. 6, the cylinder of the knitting machine rotates once, and yarn feeding is resumed for the next course, the signal issued from the program control device is transmitted to the rack lever. 8, the rack lever 8 begins to rotate by 90 degrees in the downward direction around the shaft 7.
As shown in FIG. 7, the tip 14' of the rack pawl 14 is connected to the notch 9C of the cam foil 9, and the rear end 14'' is connected to the pawl portion 3' of the selector 3.
At the same time, a yarn feeding start signal from the control device is transmitted to the solenoid 1, and the plunger 2 of the solenoid 1 is pulled, so that the selector 3 connected to the bin 4 also , the shaft 5 resists the biasing force of the spring 6.
The rear end 14' of the rack claw 14 and the selector 3
The claw portion 3' of is disengaged.

At the same time, the rack lever 8 starts to reverse and rise, so the rack claw 14 rotates through a 90 degree angle together with the rack lever 8 while its tip 14' engages with the notch 9C of the cam wheel 9.
As shown in FIG. 8, the cam wheel 9, the thread guide operating cam 10a
(The operating cam 11 also rotates by an angle of 90 degrees.

Therefore, the convex portion 18' of the thread guide operating lever 18 slides while contacting the surface of the thread guide operating cam 1° against the biasing force of the spring 20, and the fixing pin 21 is inserted into the guide groove 22 of the thread guide 16. While sliding inside, the yarn path 16 is advanced to the yarn feeding position, and the yarn is fed to the knitting needles 30 on the cylinder. on the other hand
The convex portions 27' and 2γ of the operating lever 27 slide while contacting the surface of the operating cam 11, opening the movable blade 26 of the roller 23, and at the same time, the solenoid 1 returns to return to the yarn feeding state. .

As described above in detail, the knitting yarn changing device for a circular knitting machine of the present invention operates a plurality of yarn paths individually based on a program, and feeds and stops feeding knitting yarns to a circular knitting machine. A knitting yarn exchange device for knitting yarns includes a solenoid, a selector connected to the tip of a plunger of the solenoid and swings as the plunger moves back and forth, and a cam wheel that rotates simultaneously on a camshaft.
Yarn path operating cam, L: an operating cam, a rack lever that is reciprocated at an angle of 90 degrees about the camshaft by an actuating device every rotation of the knitting machine cylinder, and a rack lever that is pivotally supported on the rack lever and whose tip is pivoted on the rack lever. is a cutout part of the cam foil, and the rear end has a rack pawl that engages with the selector and a convex part that abuts the thread guide operating cam, and the thread guide swings as the thread guide operating cam rotates. an actuation lever, a yarn path connected to the yarn path activation lever and which moves back and forth between a yarn feeding position and a yarn feeding stop position by swinging of the yarn path activation lever, and two convex portions that come into contact with the branching activation cam. It has an iron operating lever that swings with the rotation of the operating cam, and is connected to the pinch lever, and opens and closes the movable blade in response to the swinging of the operating lever and the forward and backward movement of the thread guide. It consists of a fixed blade and a movable blade, and when the cylinder of the knitting machine rotates once and the solenoid is activated according to the signal from the program control device, the plunger is pulled and the selector swings, making the selection. The engagement between the child and the rack pawl is disengaged, the notch of the cam foil and the rack pawl are maintained, and when the rack lever is rotated, the cam foil and the thread guide operating cam are rotated to replace the silk thread. Also, when the solenoid is not activated, the selector and the rack pawl remain engaged, the rack pawl and the cam wheel are disengaged, and the cam foil continues to be in a stopped state regardless of the rotation of the rack lever, and the knitting yarn is replaced. Therefore, according to the present invention, a program is created in advance for the yarn path for feeding yarn and the yarn path for stopping yarn feeding for each knitting course of the knitting machine, and a signal based on the program is sent from the control device. By instructing the device, new silk thread can be supplied to the knitting needles at any time, or the silk thread being knitted can be cut and the supply to the knitting needles can be stopped to obtain knitted products with complex patterns. Since rack claws are provided on the rack lever that engage with both sides, even when starting operation, the low-output solenoid operates quickly, reliably, and stably, and there is no need to apply surge voltage, so the electronic circuit In addition, since the mulberry field is forcibly opened and closed by a cam when changing the silk thread, the operation is light and the knitting thread can be cut reliably. .

[Brief explanation of drawings]

1 to 8 are partially omitted side views showing the operating state of the device of the present invention. 1...Solenoid 3...Selector 7...Camshaft 10...Thread guide operating cam 11...
Operating cam 14...Rack claw 16-0. Thread path 18・
... Thread path actuation lever patent applicant Daito Seiki Co., Ltd. agent Patent attorney Katsu Ohno, Rei Ohno, Ryunosuke Kono

Claims (1)

[Claims] A knitting yarn changing device for a circular knitting machine that operates multiple yarn paths individually based on a program to exchange knitting yarns, is connected to a solenoid and the plunger tip of the solenoid, and is oscillated by the forward and backward movement of the plunger. A selector that moves, a cam wheel that rotates simultaneously on the cam shaft, a thread guide operating cam, a # operating cam, and a reciprocating rotation of 90 degrees around the cam shaft by the actuating device for each rotation of the cylinder of the knitting machine. a rack lever that is pivotally supported on the rack lever, the tip of which is in the cutout of the cam foil, the rear end of which has a rack pawl that engages with the selector, and a convex portion that comes into contact with the thread guide operating cam. and a yarn guide operating lever that swings as the thread guide operating cam rotates, and which is connected to the thread guide operating lever and moves back and forth between the yarn feeding position and the yarn feeding stop position by the swinging of the yarn guiding operating lever. It has a thread path, and two convex parts that come into contact with the above-mentioned sliding actuation cam. A knitting yarn changing device for a circular knitting machine, which is composed of a sail consisting of a fixed blade and a movable blade, which opens and closes the movable blade in response to the forward and backward movement of the yarn path.